Reducing-valve.



" oponen iv. cOLLivl OF MaivsFIELn, Omo.

REnUcrNcsvALv'E'.

i No. 895,343.

To all whom it mnccm:

Beit known dass I, lGEORGE VE'. COLLIN, a ciiizenb the United States, and resident of Mansfield, in the count-y of Richland and State of Ohio, have invented certain new and l is in Reducing-Valves, of vvliich the follovsr;r is a specification.

useful lxnproverue My invention re dueing and rea'K larly to low pre` vidual railroad car for many other se ces.

mg valves and slight variations oi -its' o erations; to ate t ie valve and .ing the movement c 1ivherein lost move-v the main valve is '25 and to employ mec which insure the ev and perfect oper* tn provi'de meer the steam actu mechanism for i. position when the My invention cias of reducing ve is open.

and low prese ranged with reist" was to control its steam pressure dniphragni actu pressure side of rs-ive iol' manipulating the auxiliary valve, and 1whichV produces an 'autoniatically epe ated or balanced valve controlled by thesiun pressure in low pressure side.-

bunilar chars or=correspondi.

and of which,

reuc'ingvalver gsection taken thre Specication of Letters Patent. Application led August 17, 19 07. Serial No. 389,062.

ating systems asv-'ell as The object o the invention is to provide an autpuiaticsdly operated reducing valve 15 `which ivill be especially applicable to low pressures of steam in that 1t is sensitive to pressure and effective in )vide means intermedidiaphragm for increasrhe valve; to provide in connection with s piston a double valve ent. of one valve with relationl to the other is obtained and whereby ved from steam cutting,

e'ction with such a double valve, a cuss-ren :t amber and ports all of n balancing of the valve LAn o the device; further la;` 22 secure adgiusting the tension of r device which Includes said adiustment in cularly refers lto that t urres, comprising in part a 35 high and low press-.1re chamber with al com- 9.

bin-ed piston vai e operating intermediate thereof, an aui: ry valve intermediate the ,fre chambers, but s ar-A n to the main piston valve serves to distribute me steam and equalize 95 eration actuated by the znally to an adjustable bv the steam in low valve is located onopposite side from the inof reference denote like snsthroughout the sev-V 56 eral figures of me sconipanym drawings,

Patented Aug. 4, 190,8.

y vation of double piston valve. Fig. 4, is a. detached inverted pian view of the 'ring shown in Fig. 1, with multiplying levels conv nected. Fig. 5, is a side elevation of key for operating and loclrirgr the regulating screw.

Referrino' in detail to the characters o reference married upon the drawings 6 indicates es to steam pressure re a body whicluis chambered to form the sevarticueral com artments of my valve including in- 65., let cham er 7, having a vertically'disposed spreader 8 located central ofthe intake, an outlet chamber 9, valve chamber 10 and cushion -chamber 11. The chamber 1Q as Will be seen is 'divided by a ist-on 12 which 70 is provided with a smell pe @rat-ion 13 that 'admits a passage of steam from the inlet chamber 7 to the upper part of chamber' 10. The said piston 12 is vcounted upon a stem 14 to which is also integrally formed a valve 15 75 fitted to o.' seating 1.6 and having de ending guide wings 17 which operate vertica yin the port 18 secured in bottom of valve chamber 10.' Upon the lower portion of the valve stem 14 is slidably mounted a valve 19 which 8o is fitted to the seat 2'3 surrounding the lower "ort- 21.. Said slidable valve being retained in Operative position upon the stem by a colto the stem. It will be noted from the above that when the valve is open the high preur chamber 7 and cushion chamber 11 are connected throurh the before mentioned port 18 and that the cushion chamber 1.1 communicates through Ort -21 with the lower pressure side 90 It Wgl'further be apparent that the live steam enters the pressure. chamber. 7 through the inlet 2S .d its inllow is divided bythe vertically di sed spreader 8 whichthe pressure upon all sides of the valve and i that the outlet 24 from lov; pressure side 9 of take.

llie double piston valve 12 is chambered 1'00 to receive the auxiliary valve' 2,5 thatengagesan'annular se: 26 in piston 'chamber'-' and contains a depe mg stem 27 the lower end of which is` guiue in the contracted por A tion of opening as s` nvm. Small Orts 28 in- 105 side of piston valve stern admit o a passage of steam therethrough rwhen auxiliarv valve is open. A perforated cap 29 threadably engages the pist-on servesto inclose a light pressure spring 30 which bears lupon top of 110A auxiliary valve to insure the proper seatui'g also threaded upon the inside with a different 25 the key looseil7 -covers the shouldered endof e The means for multiplying the movementl 65 vpiston an double valves as well as the aux-A In. the lower portion of the casing A is] mounted a diaphragm 31 secured in position by the threaded head 32 of the spring c sing 33. 1Within the spring casing is mountfdhn a upper l i\u\h\34, a lower` hub 35, and a. spring 36 against the opposite ends of whichthe said bushing rests. The to of the upper bushing 34 engages the beih diapliragniil while the lower bushing` 35 is 10 engaged by an adjusting screw 37.' T his ad- 'usting screw contains a shouldered square head vfor the engagement of the socket 3S in one end of key 39 whereby the tension of the spring against thediaphragin may be changed i desired to increase oi' decrease the amount of pressure required to operate the valve.

The lower end of `the spring case ischembered as at 40 and tapped to receive an externally threaded looking shield '4f which is pitch thread `to form a diferential'lock for the screw. The said shield is obviously operated by inserting the opposite end 42 of the key 39in the shield, the pocket in this end of the screw wh its rib 43 engages the groove 44 0f the shield to insure the turning of the latter by the mani ulation of the key when the end 42 is place( therein.

of .the .valves actuated by the diaphragm, -comprisesa multiple lever connection 4that is mountedin the lower portion of the valve and for convenience of assemblage is et- 35 taclied to a riiig45 within said hub. To the inner edge of one side of this ring is pivoted a lower lever 46 `having an intermediate enlargement 47v thereon, and an upper short lever 48 also pivoted upon the inner but o po- 40 site edge of the ring. The lower side o the innerend of thislever is in engagement with the top of the enlargement 47 while the opposite or top side of the end of the lever serves to engage the lower `extremity 'of the auxiliary valve stem, and likewise the main valvestem when in operation. The underside of the enlargement 47 of the long lever 46 rests upon the top surface of the diaphragm while the extreme end portion 49 is normally free 50 from engagement with the lever 48. The preliminary engagement' o r movement of greatest resistance, is direct through the intermediate portion 47 and the'iiiner end of short lever 48 to auxiliary valve stem 2T,

while the nal movement imparted from the diaphragm is through the end 49 of long lever 46 to intermediate portion of short lever 48 the free end of which'engages the lower end of stem of the main, valve 15.

From the foregoinfr construction it will be noted that the severil operative parts, of the valve are made detachable and in a way to permit of their removal without disturbing the other arts. For instance, the combined re mentioned g Il., In@ -2 iliary valve can be`taken out by sim lyremoving the screw cap .50. The diap iragni and tension mechanism can'also be disconnectedforcleaning or repairs'by unscrewing the lieail 32 to disconnect the spring case. 70` T his latter fea ture can be accomplished while lthe main steam pressure is one.valve.

Assuming that the valve is iii use with the several chambers filled in" their respective ea,'

pacities, but all parts being in a closed posi 75 tion, it will be noted that the decreasing pressure in the low pressure chamber 9 connected. with the heating system, would permit the central portion of the diaphragm to be forced up by the action of the spring 36 30 thus first aciig direct through the engagementof the lever 46 and end of lever 4'8 to move the auxiliary valve 25 to release the ressure from chamber 10 above the piston. mme'diately following this initial movement g5 Y the levers would se iarate at that point, and the'movenient of die lower leverwould be impartedto the upper one through the contact 49 and from said upper lever to the lower end of stem of valve l5 to open thefgo same, thus requiring but a slight movement of Vthe diaphragm and lower lever to effectiv\e ly operate both valves. V

With the parts in the ositioii shown in the drawing the operation o the valves would be g5 as follows: VSteam being admittedto the valve through the intake 23 and divided bv4 the splitter bar S it passes through the small` perforation in the iston 12 equaliziiig the pressure' on both sin es of the piston in a way 100 to hold the valve 16 closed with a force equal to thejinitial pressure. The steam is next admitted to low pressure side 9 of the valve by a manual operation of screw 37 which through the medium of spring 36, lifts diaphragm 31, levers 46and 48, and the valves 25-and15. With therising of the steam pressure above normal in the low pressure side 9 of the valve,` the diaphragm is forced Aoutward or downward against the pressure 11 of' the s ring and allows the valves to ap-L roach t eir seat, should the pressure fail in I ow pressure Aside below normal the action of -the spring against the diaphragm through the medium of the levers lifts the valve allowing more steam to enter the low pressure side. The slightest increase of service pressure'will force the diaphragm outward, to a. point 'regulated by the tension of the spring, reducing the iiow of steam through the valve. 12o In'relation to the operation ofthe mainf valves with respect to its .cushion chamber and ports' leading to and from the same, it will be noted that the valve 15 is lifted from its seat by the piston 12 without raising the 125 lower valve 19 until the said upper valve 15 is clear off its seat, in a way to allow a free ow of steam into the cushion chamber. The continued movement of the valve and vits stem however brings the collar 22 into en- 130 piragm, a casing to mclose the spring, a

gagement with the underside of the valve 19 in a way to also raise it from its seat thus providing for'a free passage of steam'throufrh the valve. It -is also apparent that in t e closin of the valve the lower valve 19 is first vseate in a way to check the How of steam;

whereupcn the main valve is seated to effectivel' close the valve.

Y I 4aving thus described my invention Wha I clailri and desire to secure by Letters Patent is 1. In a reducing valve, the combination of la piston valve,4 an auxiliaryv valve, a diaphragm and spring for operating the same and means for. imparting a direct prelimina movement to the auxiliary valve and a mu tiplied final movement to both the auxiliary 2. In a reducing valve of the `class described, the combination of a piston valve, an auxiliary valve, a. diaphragm and spring for operatin .the same, means for imparting a direct pre iminary movement of`t e dia- -A 'phragnr to the auxiliary valve and a multiplied mvement to the piston valve.

3. In a' reducing valve, the combination of a piston valve, an auxiliary valve, a diaphragm and spring for operating the same, a pair Iofv levers intermediate the diaphragm and valves so connected'andv arranged as to impart a direct preliminary movement to the auxiliary' valve and a multiplied iinal move.

ment to both the auxiliary anu'main valve.

4. A reducing valve ofthe classl described the combination with .a main valve, an auxiliary valve,a diaphragm and springforxoperatinnr the same, a pair of coacting levers intermeiiate the dia hragm and valves for imparting a multiplying movement 'to the auxiliar valve, and a detachable ring to which t e levers are connected.

5. In a reducing valve, the combination with a piston, va main valve, an auxiliary valve, a diaphragm to operate the valves, a.

s ring 'to regulate the' tension of the diaing to inc-lose lthe spring, a shield threadably engagin the casing and having a groove therein or the engagement of -a ke and an adjust screw engaging both t e.casing 7. Inj/a reducing valve, the combination of.

a casing having a steam chamber, a 'cushion chamber and ports leading om one chamberto the otherand to` an outlet, a piston valve haying a stem, anvalve loosely mount- `.ed upon the stem and whereby a preliminary `end to an outlet, a iston lfvalve having guide wings to engage t e port intermediate of steam and cushion chamber and having an integral stem extended below the guide Wings, a supplemental` ed Vupon t e stem w erehy a preliminary movement of' the valve u on 'the stem is permitted with relation to tii of the other valvel.

9. .ln a valve, the-'combination of a .piston valve loosely mounte ports in advance andan -auxiliary valve, a diaphragm for operatin the same, a steam chamber, having an out et ort to a cushion chamber, a cush ion chamber having an outlet port to low pressure side ofvalve, a supplementary valve .oos'ely mounted upon the stem of main valve whereby a reliminary movement of one valve upon he stem is permitted with relation to its port, in advance of the other valve on stem.

10. A'V reducing valve comprisin a diaphraG-m', a main valve chamber, an a cush'- lon c amber having an inlet port'rom the main steam chamber and an outlet, of a piston mounted in the main steam chamber, a, valve to close the port leading to the cushion chamber, a second valve loosel connected with the stem of the first valve or enga ing outlet port from the AAcushion cham er,

whereby a movement of one valve is effected by the movement of the stem and in advance or the movement of the other valve.

Si ned at Mansfield,- in the county of Rich and, and State of Ohio this 29th day of July, A. D., 1907. GEORGE W. COLLIN.

Witnesses:

J. RoWLairD Bri-own, 'l

P. J. KELLEY. 

